The XBB family of Omicron has landed in the U.S. Here’s what it means for this fall’s COVID wave
XBB—a new, extremely immune-evasive Omicron variant surging in Singapore—hasn’t yet been detected in the U.S.
XBB—a new, extremely immune-evasive Omicron variant surging in Singapore—hasn’t yet been detected in the U.S.